Simple Pendulum Experiment Worksheet

Science experiments lesson 23: Simple pendulum timing · Set 418 · 40 questions

What you do (Only the length matters): 1. Tie the nut to the string and hang it from the taped pencil, 30 cm long. 2. Pull it a little to one side and let go — do not push. 3. Time 10 swings and divide by 10. 4. Change only the string length (60 cm), time 10 swings again, and stand back from the bob.

1. 1.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the weight of the bob is kept the same. (a) True (b) False
2. 2.🧺 Do we need yeast for the pendulum? (a) needed (b) not needed
3. 3.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) quicker (c) stopped (d) heavier
4. 4.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it doubles (b) it halves (c) it stays the same (d) it becomes 4 times
5. 5.True or false: a ruler is not needed for the pendulum. (a) True (b) False
6. 6.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) time for 10 swings (b) the string length (c) the same hook
7. 7.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is the one thing we change? (a) the same hook (b) the weight of the bob (c) time for 10 swings (d) the string length
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the same hook”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
10. 10.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 39 seconds?
11. 11.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) yes, much faster (c) yes, much slower (d) no, hardly at all
12. 12.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
13. 13.🧺 Which of these is not needed for the pendulum? (a) a heavy nut or washer (b) a ruler (c) a pencil and tape (d) turmeric powder
14. 14.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a stopwatch (c) a mirror (d) a heavy nut or washer
15. 15.🧺 Do we need a magnet for the pendulum? (a) not needed (b) needed
16. 16.🧺 Which of these is needed for the pendulum? (a) yeast (b) a balloon (c) a ruler (d) a magnet
17. 17.True or false: yeast is needed for the pendulum. (a) True (b) False
18. 18.🕰️ A pendulum takes 3 seconds for one swing. How many swings does it make in 15 seconds?
19. 19.🕰️ Which change makes a pendulum swing more slowly? (a) a shorter string (b) a heavier bob (c) a lighter bob (d) a longer string
20. 20.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 32 seconds?
21. 21.🧺 Do we need a balloon for the pendulum? (a) not needed (b) needed
22. 22.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
23. 23.🧺 Which of these is not needed for the pendulum? (a) a ruler (b) a battery cell (c) a stopwatch (d) a string
24. 24.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is wet (c) the bob could hit you (d) it is magnetic
25. 25.🛟 What is a safe bob for a home pendulum? (a) a glass bottle (b) a sharp tool (c) a small nut or washer (d) a heavy brick
26. 26.🧺 Do we need a ruler for the pendulum? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a battery cell (b) a pencil and tape (c) a heavy nut or washer (d) a ruler
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
29. 29.True or false: a balloon is needed for the pendulum. (a) True (b) False
30. 30.🧺 Do we need a stopwatch for the pendulum? (a) needed (b) not needed
31. 31.🕰️ A pendulum makes 5 swings in 10 seconds. How many seconds does one swing take?
32. 32.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a balloon (b) a heavy nut or washer (c) a string (d) a pencil and tape
33. 33.🧺 Which of these is needed for the pendulum? (a) yeast (b) a mirror (c) a pencil and tape (d) a battery cell
34. 34.True or false: a battery cell is not needed for the pendulum. (a) True (b) False
35. 35.True or false: a mirror is needed for the pendulum. (a) True (b) False
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is what we measure. (a) True (b) False
37. 37.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) False (b) True
38. 38.📘 What pulls the pendulum bob back down after each swing? (a) the wind (b) gravity (c) magnetism (d) the string
39. 39.🧺 Which of these is not needed for the pendulum? (a) yeast (b) a string (c) a heavy nut or washer (d) a stopwatch
40. 40.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a pencil and tape (b) a ruler (c) turmeric powder (d) a string

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